I've been lifting weights since January 2010. I typically follow one routine for six weeks and then take a week (sometimes two) off before starting a modified routine.
What I've noticed is that when I resume lifting after an idle week, I become incredibly sleepy four or five hours after my weightlifting session. This lasts for about a week and then I no longer have to deal with this sleepiness until I resume lifting after taking another week.
Does anyone have a good idea of what's going on here? I think I actually gain more muscle during my first week exercising after a break but I really am not sure.
Should I try switching to 3 weeks of lifting with one week breaks or am I over thinking this?